Electrode manufacturing apparatus including electrode alignment unit and electrode assembly manufacturing apparatus including the same

Abstract

The present invention relates to an electrode manufacturing device and an electrode assembly manufacturing device including the electrode manufacturing device, the electrode manufacturing device including: a first electrode conveying unit, which is configured to convey a first electrode with an electrode coating formed on one surface or two opposite surfaces; a first cutter, which is configured to cut the first electrode conveyed by the first electrode conveying unit to form a first unit electrode; a first diaphragm conveying unit arranged on one side of the first electrode conveying unit, the first diaphragm conveying unit being configured to convey the first diaphragm; a first sensor unit, which is configured to sense the position of the first unit electrode; and a first alignment unit, which is configured to adjust the conveying speed of the outer periphery of the first unit electrode parallel to its conveying direction so as to adjust the interval between the first unit electrodes placed on one surface of the first diaphragm, wherein before the process of stacking and laminating electrodes with different polarities, it is determined whether the positive electrode and the negative electrode are aligned with each other, and then the positive electrode and the negative electrode are stacked, thereby preventing defective electrodes from being generated due to misalignment between the positive electrode and the negative electrode.

Description

Technical Field

[0001] This application claims the benefit of priority from Korean Patent Application No. 2020-0134691, filed on October 16, 2020, the disclosure of which is incorporated herein by reference in its entirety.

[0002] The present invention relates to an electrode manufacturing apparatus including an electrode alignment unit, and an electrode assembly manufacturing apparatus including the electrode manufacturing apparatus. More specifically, the present invention relates to an electrode manufacturing apparatus including the electrode alignment unit, which is capable of adjusting the conveying direction of unit electrodes cut from an electrode sheet so that the spacing between the cut line ends of the unit electrodes remains uniform, and is capable of adjusting the alignment between positive and negative electrodes before the lamination step of the electrode assembly. Background Art

[0003] Lithium secondary batteries have been used as energy sources for mobile devices and wearable devices, and have also been widely used as energy sources for electric vehicles and hybrid electric vehicles.

[0004] Lithium secondary batteries are classified according to the shape of the battery case into: cylindrical secondary batteries with electrode assemblies mounted in cylindrical metal cans, prismatic secondary batteries with electrode assemblies mounted in prismatic metal cans, or pouch-shaped secondary batteries with electrode assemblies mounted in pouch-shaped cases made of aluminum laminate sheets.

[0005] The electrode assembly is manufactured by stacking a positive electrode and a negative electrode with a separator interposed therebetween to manufacture a single cell, and stacking a plurality of the single cells or winding the single cells in a state where the single cells are disposed on a separator.

[0006] To manufacture a single cell, a positive electrode cut from a positive electrode sheet is attached to a first separator sheet, and a negative electrode cut from a negative electrode sheet is attached to a second separator sheet. The first separator sheet with the positive electrode attached and the second separator sheet with the negative electrode attached are then stacked, heated, and pressed to laminate them. Separator sheets between the electrodes can also be cut to manufacture individual cells.

[0007] If the intervals between the positive electrodes on the first separator sheet and the negative electrodes on the second separator sheet are not kept uniform and deviate from a predetermined range, the positive and negative electrodes cannot be aligned with each other in the subsequent process of stacking and laminating the electrodes.

[0008] In conventional electrode assembly manufacturing equipment, it is difficult to determine whether the positive and negative electrodes are aligned during the process of stacking and arranging the positive and negative electrodes. Since the alignment of the positive and negative electrodes is determined after the lamination process, defective electrodes can be sorted and excluded from the final manufactured electrodes; however, it is difficult to reduce the incidence of defective electrodes.

[0009] Patent Document 1 discloses a single cell manufacturing method including: detecting the position of a negative electrode bonded to a tape-type separator using a camera configured to detect the bonded position of the negative electrode; and correcting the position of the positive electrode using a positive electrode alignment tool based on the detected position of the negative electrode.

[0010] Patent Document 1 discloses a method for manufacturing a single cell by providing a positive electrode and a negative electrode on opposite surfaces of a separator and providing another separator on an outer surface of each of the positive electrode and the negative electrode that does not face the separator, but does not disclose a method for uniformly controlling the interval between electrodes cut from an electrode sheet.

[0011] Patent document 2 discloses a secondary battery manufacturing device that measures the position of the larger electrode, i.e., the first electrode, among the first and second electrodes included in a unit cell to adjust the interval between the unit cells arranged on a diaphragm sheet, thereby accurately maintaining the interval between the unit cells and thus improving the stacking quality of the unit cells.

[0012] However, Patent Document 2 only teaches a technique capable of arranging unit cells each including a positive electrode and a negative electrode on a separator sheet so that the intervals between the unit cells are kept uniform.

[0013] When a single cell is manufactured by attaching a positive electrode to one separator sheet and a negative electrode to another separator sheet, and these electrodes are bonded together, 1) the positions of the positive and negative electrodes may shift during movement for bonding; and 2) alignment of the positive and negative electrodes may be difficult due to stretching of the separator sheet. To address these issues, an electrode manufacturing apparatus capable of aligning the positive and negative electrodes before the lamination process and an electrode assembly manufacturing apparatus including the same are needed.

[0014] Korean Patent Application Publication No. 2019-0113907 (October 8, 2019) "Patent Document 1"

[0015] Korean Patent Application Publication No. 2019-0113022 (October 8, 2019) "Patent Document 2" Summary of the Invention

[0016] Technical issues

[0017] The present invention has been made in view of the above problems, and its purpose is to provide an electrode manufacturing device and an electrode assembly manufacturing device including the electrode manufacturing device, which is capable of uniformly controlling the spacing between first unit electrodes attached to the first diaphragm sheet and uniformly controlling the spacing between second unit electrodes attached to the second diaphragm sheet, and is capable of adjusting the bonding position of the first unit electrode and the bonding position of the second unit electrode before lamination between the first unit electrode and the second unit electrode so that the first unit electrode and the second unit electrode are aligned with each other.

[0018] Technical Solution

[0019] In order to achieve the above-mentioned purpose, the first electrode manufacturing equipment according to the present invention includes: a first electrode conveying unit, the first electrode conveying unit being configured to convey a first electrode having an electrode coating formed on one surface or two opposite surfaces; a first cutter, the first cutter being configured to cut the first electrode conveyed by the first electrode conveying unit to form a first unit electrode; a first diaphragm conveying unit arranged on one side of the first electrode conveying unit, the first diaphragm conveying unit being configured to convey a first diaphragm; a first sensor unit, the first sensor unit being configured to sense the position of the first unit electrode; and a first alignment unit, the first alignment unit being configured to adjust the conveying speed of the outer periphery of the first unit electrode parallel to its conveying direction so as to adjust the interval between the first unit electrodes placed on one surface of the first diaphragm.

[0020] In the first electrode manufacturing apparatus according to the present invention, the first sensor unit may include two or more sensors configured to sense the speed of the outer periphery of the first unit electrode parallel to its conveying direction, and the first alignment unit may include at least two correction rollers arranged on one surface of the first unit electrode.

[0021] In the first electrode manufacturing apparatus according to the present invention, when the cut outer periphery of the first unit electrode measured by the first sensor unit is not disposed perpendicular to the conveying direction, the first alignment unit may adjust a supply speed of both ends of the first unit electrode supplied to the first diaphragm.

[0022] In addition, the present invention provides an electrode assembly manufacturing device, including: a first electrode supply unit, the first electrode supply unit is configured to convey the first unit electrode manufactured by the first electrode manufacturing device; a third sensor unit, the third sensor unit is configured to sense the position of the first unit electrode; a second electrode manufacturing device configured to manufacture a second unit electrode; and a combining unit, the combining unit is configured to combine the first unit electrode and the second unit electrode with each other to manufacture a single cell, wherein the second electrode manufacturing device includes: a second electrode conveying unit, the second electrode conveying unit is configured to convey a second electrode having an electrode coating formed on one surface or two opposite surfaces; a second cutter, the second cutter is configured to cut the second electrode conveyed by the second electrode conveying unit to form a second unit electrode; a second diaphragm conveying unit arranged on one side of the second electrode conveying unit, the second diaphragm conveying unit is configured to convey a second diaphragm; a second sensor unit, the second sensor unit is configured to sense the position of the second unit electrode; and a second alignment unit, the second alignment unit is configured to adjust the conveying speed of both ends of the second unit electrode parallel to its conveying direction so as to adjust the interval between the second unit electrodes placed on one surface of the second diaphragm.

[0023] In the electrode assembly manufacturing apparatus according to the present invention, the second alignment unit may adjust the interval between the second unit electrodes based on the positions of the first unit electrodes sensed by the third sensor unit so that the second unit electrodes are aligned with the first unit electrodes at the coupling unit.

[0024] In the electrode assembly manufacturing equipment according to the present invention, the second sensor unit may include two or more sensors, and the two or more sensors of the second sensor unit are configured to sense the positions of the outer peripheries of the second unit electrode on both sides parallel to its conveying direction, the third sensor unit may include two or more sensors, and the two or more sensors of the third sensor unit are configured to sense the positions of the outer peripheries of the first unit electrode on both sides parallel to its conveying direction, and the second alignment unit may include at least two correction rollers arranged on one surface of the second unit electrode.

[0025] In the electrode assembly manufacturing equipment according to the present invention, the correction roller may be arranged on the upper surface of the second unit electrode, the conveying roller may be arranged below the correction roller and on the lower surface of the second unit electrode, and the conveying roller may be configured to have a structure in which multiple rollers are combined with each other, and the speed of the multiple rollers can be controlled to be equal to the rotation speed of the correction roller.

[0026] In the electrode assembly manufacturing apparatus according to the present invention, the bonding unit may include a laminating roller configured to laminate the first unit electrode and the second unit electrode to each other.

[0027] In the electrode assembly manufacturing apparatus according to the present invention, a third cutter configured to cut the first separator and the second separator of the battery cell to manufacture unit battery cells may be further included.

[0028] In the electrode assembly manufacturing apparatus according to the present invention, a visual inspection unit configured to inspect an alignment state of the first unit electrode and the second unit electrode of the unit battery cells may be further included.

[0029] In the electrode assembly manufacturing apparatus according to the present invention, a control variable of the second alignment unit may be adjusted based on the inspection result of the visual inspection unit. The control variable of the second alignment unit may be a rotation speed of a correction roller of the second alignment unit.

[0030] Furthermore, the present invention can provide all possible combinations of the above-mentioned solutions.

[0031] Beneficial effects

[0032] It is obvious from the above description that in the present invention, the conveying speed of the outer periphery of the unit electrodes attached to the diaphragm sheet on both sides parallel to its conveying direction can be adjusted while sensing the interval between the unit electrodes, so that the interval between the unit electrodes attached to the diaphragm sheet can be uniformly maintained.

[0033] The above steps were performed similarly for the positive electrode and the negative electrode.

[0034] In addition, the position of one of the positive and negative electrodes is sensed so that the position of the other electrode is adjusted in a step before the positive and negative electrodes are combined so that the combined position of the positive electrode and the combined position of the negative electrode coincide with each other, so that the positive and negative electrodes can be combined with each other in a state of being aligned with each other.

[0035] In the present invention, control can be performed so that the stacking position of the positive electrode and the stacking position of the negative electrode coincide with each other before the lamination process in which the positive electrode and the negative electrode are stacked and bonded to each other, thereby preventing misalignment between the positive electrode and the negative electrode.

[0036] In the present invention, it is possible to prevent the capacity of the battery from being reduced due to misalignment between the positive electrode and the negative electrode, and it is possible to prevent the energy density of the battery from being reduced due to an increase in the volume of the electrode assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a perspective view of an electrode manufacturing apparatus according to the present invention.

[0038] Figure 2 is a perspective view of an electrode assembly manufacturing apparatus according to the present invention.

[0039] Figure 3 1 is a side view of a single cell passing through the visual inspection unit of the present invention. DETAILED DESCRIPTION

[0040] Now, the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the preferred embodiments of the present invention. However, in describing the working principles of the preferred embodiments of the present invention in detail, when the detailed description of known functions and structures incorporated herein may obscure the main purpose of the present invention, the detailed description will be omitted.

[0041] In addition, the same reference numerals will be used throughout the drawings to represent components that perform similar functions or operations. Where a component is referred to as being connected to another component throughout the application, the component may be directly connected to the other component and may also be indirectly connected to the other component via another component. In addition, the inclusion of an element does not mean the exclusion of other elements, but rather means that other elements may be further included unless otherwise specified.

[0042] Embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0043] Figure 1 is a perspective view of an electrode manufacturing apparatus according to the present invention.

[0044] Reference Figure 1 The electrode manufacturing apparatus 100 according to the present invention is a first electrode manufacturing apparatus, and the first electrode may be a positive electrode or a negative electrode.

[0045] The electrode manufacturing apparatus 100 includes: a first electrode conveying unit 110, the first electrode conveying unit 110 being configured to convey a first electrode 111 having an electrode coating formed on one surface or two opposing surfaces; a first cutter 120, the first cutter 120 being configured to cut the first electrode 111 conveyed by the first electrode conveying unit 110 to form a first unit electrode 112; a first diaphragm conveying unit 130 arranged on one side of the first electrode conveying unit 110, the first diaphragm conveying unit being configured to convey a first diaphragm 131; a first sensor unit 140, the first sensor unit 140 being configured to sense a position of the first unit electrode 112; and a first alignment unit 150, the first alignment unit 150 being configured to adjust a conveying speed of an outer periphery 114 of the first unit electrode 112 parallel to its conveying direction A so as to adjust the interval between the first unit electrodes 112 placed on one surface of the first diaphragm 131.

[0046] The first electrode 111 is configured in the form of an electrode roll in which an electrode sheet is wound. The electrode sheet has an electrode coating formed on one surface or two opposing surfaces of an electrode foil. At least one side of the electrode sheet having the electrode coating formed thereon has an uncoated portion without the electrode coating formed thereon. The first electrode may be in a state in which a portion of the uncoated portion is punched out to form an electrode tab.

[0047] The first separator 131 may be configured in the form of a separator roll in which a separator sheet is wound, or may be configured to have a size in which an excess portion further extends from an outer periphery of one first unit electrode.

[0048] The first sensor unit 140 includes sensors 141 and 142 configured to sense the speed of the outer periphery 114 of the first unit electrode 112 parallel to its conveying direction A. The sensors are each disposed at a corresponding one of the outer peripheries of the first unit electrode 112 parallel to its conveying direction A.

[0049] Each of sensors 141 and 142 includes a transmitter configured to transmit a signal and a receiver configured to receive a signal, and the transmitter and receiver are arranged to face each other. A first unit electrode passes between the transmitter and the receiver. The placement position of the first unit electrode, the movement speed of the first unit electrode, the degree of alignment of opposing sides of the first unit electrode, and the spacing between the first unit electrodes can be derived based on whether the light or wavelength emitted by the transmitter is received by the receiver, the time of reception, and the time of non-reception.

[0050] When the values ​​of the intervals between the first unit electrodes measured by the sensors are inconsistent with each other, it can be determined that the first unit electrodes are rotated or deviated from their moving positions, and the first sensor unit can send a calibration signal to the first alignment unit so that the moving direction of the first unit electrodes is adjusted.

[0051] Although the specific positions of the sensors 141 and 142 are not specified, as long as the sensors sense the positions of both ends of the cut outer periphery 118 of the first unit electrode to measure the interval between the first unit electrodes, it is preferred that the sensors be disposed at the outer periphery 114 of the first unit electrode parallel to the conveying direction thereof to improve measurement accuracy. Figure 1 As shown in .

[0052] The first alignment unit 150 includes two correction rollers 151 provided on one surface of the first unit electrode 112 .

[0053] If the cut outer periphery 118 of the first unit electrode measured by the first sensor unit 140 is not perpendicular to the conveying direction A of the first unit electrode, the measured value may be sent to the first alignment unit 150 to adjust the moving direction of the first unit electrode. The correction roller 151 of the first alignment unit 150 may adjust the supply speed of both ends of the first unit electrode 112 supplied to the first diaphragm 131 in the y-axis direction.

[0054] The rotation speeds of the correction rollers 151 may be individually adjusted. The rotation speed of one of the correction rollers 151 may be increased or decreased so that the interval between the first unit electrodes measured by the first sensor unit 140 is within an allowable range.

[0055] For example, if the spacing between adjacent first unit electrodes 112 measured by sensor 141 on the side with first electrode tabs 113 is greater than the spacing between first unit electrodes 112 measured by sensor 142 on the side without electrode tabs, the rotation speed of the correction roller on the side with the electrode tabs can be increased. As described above, the first unit electrodes can be rotated in the x-axis direction about the central axis of the first unit electrodes 112, thereby changing the direction of movement of the first unit electrodes. Even if the direction of movement of the first unit electrodes deviates due to local stretching of the first diaphragm or sagging of the first electrodes, the spacing between the first unit electrodes can be maintained uniform.

[0056] The correction roller 151 is provided on the upper surface of the first unit electrode 112 and is provided at both ends of the first unit electrode in the y-axis direction, rather than at the central portion of the first unit electrode.

[0057] There is no special restriction on the specific position of the correction roller of the first alignment unit, as long as the first unit electrode is rotated from the central axis of the first unit electrode in the x-axis direction to change the moving direction of the first unit electrode, but considering the control efficiency of the first unit electrode, preferably, the correction roller is arranged at both ends of the outer periphery of the first unit electrode parallel to the conveying direction of the first unit electrode.

[0058] Furthermore, even if the measurement result of the first sensor unit is transmitted to the first alignment unit and the movement direction of the first unit electrode is accurately changed, the movement direction of the first unit electrode may be changed again while the first unit electrode, whose movement direction has been changed, is being transported to be attached to the first diaphragm. Therefore, the first sensor unit and the first alignment unit need to be arranged adjacent to each other.

[0059] For example, the first sensor unit 140 is configured to measure the interval between the first unit electrode 112b that is transferred to be attached to the first diaphragm 131 and the first unit electrode 112a that is transferred immediately after the first unit electrode 112b. The first alignment unit 150 may be provided on the first unit electrode 112b, and the first alignment unit 150 may control the movement speed and movement direction of the first unit electrode 112b based on the interval between the first unit electrodes measured by the first sensor unit 140.

[0060] although Figure 1 Although omitted in the present invention, in the first electrode manufacturing apparatus including the first electrode transport unit and the first diaphragm transport unit, the first electrode, the first unit electrode, and the first diaphragm can be transported by a roller-type or conveyor-type transport device disposed below them. Furthermore, the electrodes can be manufactured in a region where the central axes of the first electrode, the first unit electrode, and the first diaphragm in the transport direction are parallel to each other.

[0061] That is, the relative speed of the outer peripheries of the first unit electrode parallel to its conveying direction may be adjusted based on the conveying speed of the center axis of the first unit electrode in the conveying direction to attach the first unit electrode to the first diaphragm.

[0062] Figure 2 is a perspective view of an electrode assembly manufacturing apparatus according to the present invention.

[0063] Reference Figure 2 The electrode assembly manufacturing apparatus according to the present invention includes: a first electrode supply unit 300, the first electrode supply unit 300 is configured to deliver Figure 1a first unit electrode 112 manufactured by a first electrode manufacturing apparatus 100; a third sensor unit 340, the third sensor unit 340 is configured to sense a position of the first unit electrode 112; a second electrode manufacturing apparatus 200 configured to manufacture a second unit electrode 212; and a bonding unit 360, the bonding unit 360 is configured to bond the first unit electrode 112 and the second unit electrode 212 to each other to manufacture a single cell. The second electrode manufacturing equipment 200 includes: a second electrode conveying unit 210, the second electrode conveying unit 210 is configured to convey a second electrode 211 having an electrode coating formed on one surface or two opposite surfaces; a second cutter 220, the second cutter 220 is configured to cut the second electrode 211 conveyed by the second electrode conveying unit 210 to form a second unit electrode 212; a second diaphragm conveying unit 230 arranged on one side of the second electrode conveying unit 210, the second diaphragm conveying unit is configured to convey the second diaphragm 231; a second sensor unit 240, the second sensor unit 240 is configured to sense the position of the second unit electrode 212; and a second alignment unit 250, the second alignment unit 250 is configured to adjust the conveying speed of both ends of the second unit electrode 212 parallel to its conveying direction so as to adjust the interval between the second unit electrodes 212 placed on one surface of the second diaphragm 231.

[0064] The descriptions of the first electrode conveying unit, the first cutter, the first diaphragm conveying unit, the first sensor unit and the first alignment unit of the first electrode manufacturing apparatus 100 are respectively and identically applied to the second electrode conveying unit 210, the second cutter 220, the second diaphragm conveying unit 230, the second sensor unit 240 and the second alignment unit 250 of the second electrode manufacturing apparatus 200, and therefore their detailed descriptions can be understood to be within the same scope.

[0065] The third sensor unit 340 measures the interval between the first unit electrodes 112 that are conveyed to overlap with the second unit electrodes 212. The third sensor unit 340 includes sensors 341 and 342 configured to sense the speed of the outer periphery of the first unit electrode 112 parallel to its conveying direction. Each sensor is provided at a corresponding one of the outer peripheries of the first unit electrode 112 parallel to its conveying direction. The operating principle and function of the sensors 341 and 342 are similar to those of the reference Figure 1 The operating principle and functionality of the described sensors 141 and 142 are identical.

[0066] The second alignment unit 250 may adjust an interval between the second unit electrodes 212 based on the position of the first unit electrode 112 sensed by the third sensor unit 340 so that the second unit electrode 212 is aligned with the first unit electrode 112 at the coupling unit 360 .

[0067] The second sensor unit 240 includes sensors 241 and 242 configured to sense the positions of the outer peripheries 214 of the second unit electrode 212 on opposite sides parallel to the conveying direction thereof, and the third sensor unit 340 includes sensors 341 and 342 configured to sense the positions of the outer peripheries of the first unit electrode on opposite sides parallel to the conveying direction thereof. The second alignment unit 250 includes two correction rollers 251 provided on the upper surface of the second unit electrode 212.

[0068] Therefore, it is possible to measure whether the intervals between the cut outer periphery 218 of the second unit electrode 212 and the cut outer periphery of the adjacent second unit electrode measured by the sensors 241 and 242 of the second sensor unit 240 are uniform. If the intervals are not uniform, a calibration signal is sent to the second alignment unit 250 to change the conveying speed of the outer periphery of the second unit electrode 212 parallel to its conveying direction.

[0069] Therefore, control may be performed to change the rotation speed of the correction roller configured to convey the second unit electrode, so that the moving direction and position of the second unit electrode can be corrected.

[0070] For example, the second sensor unit 240 is configured to measure the interval between the second unit electrode 212b transferred to be attached to the second diaphragm 231 and the second unit electrode 212a transferred immediately after the second unit electrode 212b. The third sensor unit 340 is configured to measure the interval between the first unit electrodes 112.

[0071] The second alignment unit 250 is disposed on the second unit electrode 212 b and transfers the second unit electrode to the first unit electrode with the interval between the first unit electrodes 112 measured by the third sensor unit 340 .

[0072] Therefore, when the interval between the second unit electrodes measured by the second sensor unit 240 is inconsistent with the interval between the first unit electrodes measured by the third sensor unit 340 , the second alignment unit 250 may control the movement speed and movement direction of the second unit electrode 212 .

[0073] In a specific example, the correction roller 251 may be disposed on the upper surface of the second unit electrode 212, the transfer roller 215 may be disposed below the correction roller 251 and on the lower surface of the second unit electrode 212, and the transfer roller 215 may be configured to have a structure in which a plurality of rollers are coupled to each other, and the speeds of the plurality of rollers can be controlled to be equal to the rotation speed of the correction roller 251.

[0074] The overall length of the transfer roller 215 may be longer than the y-axis length of the second unit electrode.

[0075] The bonding unit 360 includes a pair of laminating rollers 361 disposed above the first unit electrode 112 and below the second unit electrode 212 to laminate the first unit electrode 112 and the second unit electrode 212 to each other. The laminating rollers 361 may be configured to be selectively heated.

[0076] Figure 3 1 is a side view of a single cell passing through the visual inspection unit of the present invention.

[0077] Reference Figure 3 The first unit electrode 112 is disposed on the first separator 131, and the second unit electrode 212 is disposed on the second separator 231. A single cell configured to increase the bonding force between the first separator 131, the first unit electrode 112, the second unit electrode 212, and the second separator 231 can be manufactured by pressing with the laminating roller 361.

[0078] According to the present invention, the electrode assembly manufacturing equipment includes a third cutter 320, which is configured to cut the first separator 131 and the second separator 231 of the single cell to manufacture the unit cell 380, and the electrode assembly manufacturing equipment includes a visual inspection unit 400, which is configured to inspect the alignment status of the first unit electrode 112 and the second unit electrode 212 of the unit cell 380.

[0079] In the case where the first unit electrode and the second unit electrode are not aligned with each other as a measurement result of the visual inspection unit 400, the control variable of the second alignment unit can be adjusted, and the second alignment unit can adjust the position and movement direction of the second unit electrode so that the first unit electrode and the second unit electrode are aligned with each other.

[0080] In the present invention, as described above, whether the positive electrode and the negative electrode are aligned with each other can be determined in a step before manufacturing a single cell, so that manufacturing of an electrode assembly having a stacking defect can be prevented.

[0081] Those skilled in the art to which the present invention pertains will appreciate that various applications and modifications are possible within the scope of the present invention based on the above description.

[0082] (Explanation of Reference Numbers)

[0083] 100: Electrode manufacturing equipment

[0084] 110: First electrode transmission unit

[0085] 111: First electrode

[0086] 112, 112a, 112b: first unit electrode

[0087] 113: First electrode contact

[0088] 114, 214: Outer periphery parallel to the conveying direction

[0089] 118, 218: Cutting the outer perimeter

[0090] 120: First cutter

[0091] 130: First diaphragm transmission unit

[0092] 131: First diaphragm

[0093] 140: First sensor unit

[0094] 141, 142, 241, 242, 341, 342: Sensors

[0095] 150: First alignment unit

[0096] 151, 251: Correction roller

[0097] 200: Electrode assembly manufacturing equipment

[0098] 210: Second electrode transmission unit

[0099] 211: Second electrode

[0100] 212, 212a, 212b: second unit electrodes

[0101] 215: Conveyor roller

[0102] 220: Second cutter

[0103] 230: Second diaphragm transmission unit

[0104] 231: Second diaphragm

[0105] 240: Second sensor unit

[0106] 250: Second alignment unit

[0107] 300: First electrode supply unit

[0108] 340: Third sensor unit

[0109] 360: Combined Unit

[0110] 361: Roller

[0111] 320: Third cutter

[0112] 380: single cell

[0113] 400: Visual inspection unit.

[0114] Industrial Applicability

[0115] The present invention relates to an electrode manufacturing device and an electrode assembly manufacturing device including the electrode manufacturing device, the electrode manufacturing device including: a first electrode conveying unit, the first electrode conveying unit being configured to convey a first electrode having an electrode coating formed on one surface or two opposite surfaces; a first cutter, the first cutter being configured to cut the first electrode conveyed by the first electrode conveying unit to form a first unit electrode; a first diaphragm conveying unit arranged on one side of the first electrode conveying unit, the first diaphragm conveying unit being configured to convey the first diaphragm; a first sensor unit, the first sensor unit being configured to sense the position of the first unit electrode; and a first alignment unit, the first alignment unit being configured to adjust the conveying speed of both ends of the first unit electrode parallel to its conveying direction so as to adjust the interval between the first unit electrodes placed on one surface of the first diaphragm, wherein before the process of stacking and laminating electrodes with different polarities, it is determined whether the positive electrode and the negative electrode are aligned with each other, and then the positive electrode and the negative electrode are stacked, thereby preventing defective electrodes from being generated due to misalignment between the positive electrode and the negative electrode, and therefore the present invention has industrial applicability.

Claims

1. A first electrode manufacturing device, comprising: a first electrode conveying unit configured to convey a first electrode having an electrode coating formed on one surface or two opposing surfaces; a first cutter configured to cut the first electrode transferred by the first electrode transfer unit to form a first unit electrode; a first diaphragm conveying unit provided on one side of the first electrode conveying unit, the first diaphragm conveying unit being configured to convey a first diaphragm; a first sensor unit configured to sense a position of the first unit electrode; and a first alignment unit configured to adjust a conveying speed of an outer periphery of the first unit electrode parallel to a conveying direction thereof so as to adjust a spacing between the first unit electrodes placed on one surface of the first diaphragm so that a spacing between ends of cut lines of the first unit electrodes remains uniform; in The first sensor unit includes two or more sensors configured to sense velocities of outer peripheries of opposite sides of the first unit electrode parallel to a conveying direction thereof, and The first alignment unit includes at least two correction rollers provided on one surface of the first unit electrode, and The at least two correction rollers are respectively disposed on the opposite outer peripheries of the first unit electrode that are parallel to a conveying direction thereof.

2. The first electrode manufacturing apparatus according to claim 1, wherein The first alignment unit adjusts a supply speed of both ends of the first unit electrode supplied to the first diaphragm when the cut outer periphery of the first unit electrode measured by the first sensor unit is not disposed perpendicular to the conveying direction.

3. An electrode assembly manufacturing device comprising: a first electrode supply unit configured to deliver the first unit electrode manufactured by the first electrode manufacturing apparatus according to claim 1 or 2; a third sensor unit configured to sense a position of the first unit electrode; a second electrode manufacturing apparatus configured to manufacture a second unit electrode; and a bonding unit configured to bond the first unit electrode and the second unit electrode to each other to manufacture a single cell, wherein The second electrode manufacturing equipment includes: a second electrode conveying unit configured to convey a second electrode having an electrode coating formed on one surface or two opposing surfaces; a second cutter configured to cut the second electrode transferred by the second electrode transfer unit to form a second unit electrode; a second diaphragm conveying unit disposed on one side of the second electrode conveying unit, the second diaphragm conveying unit being configured to convey a second diaphragm; a second sensor unit configured to sense a position of the second unit electrode; and A second alignment unit configured to adjust a conveyance speed of both ends of the second unit electrodes parallel to a conveyance direction thereof so as to adjust an interval between the second unit electrodes placed on one surface of the second diaphragm.

4. The electrode assembly manufacturing equipment according to claim 3, wherein the second alignment unit adjusts the interval between the second unit electrodes based on the position of the first unit electrode sensed by the third sensor unit so that the second unit electrode is aligned with the first unit electrode at the combining unit.

5. The electrode assembly manufacturing apparatus according to claim 3, wherein The second sensor unit includes two or more sensors, and the two or more sensors of the second sensor unit are configured to sense positions of outer peripheries of opposite sides of the second unit electrode parallel to a transmission direction thereof, The third sensor unit includes two or more sensors, the two or more sensors of the third sensor unit are configured to sense positions of outer peripheries of opposite sides of the first unit electrode parallel to a transmission direction thereof, and The second alignment unit includes at least two correction rollers provided on one surface of the second unit electrode.

6. The electrode assembly manufacturing apparatus according to claim 5, wherein The correction roller is provided on the upper surface of the second unit electrode, A conveying roller is provided below the correction roller and on the lower surface of the second unit electrode, and The conveying roller is configured to have a structure in which a plurality of rollers are coupled to each other, and the speeds of the plurality of rollers can be controlled to be equal to the rotation speed of the correction roller. 7 . The electrode assembly manufacturing apparatus of claim 3 , wherein the bonding unit comprises a laminating roller configured to laminate the first unit electrode and the second unit electrode to each other. 8 . The electrode assembly manufacturing apparatus of claim 3 , further comprising a third cutter configured to cut the first separator and the second separator of the battery cell to manufacture unit battery cells. 9 . The electrode assembly manufacturing apparatus of claim 8 , further comprising a visual inspection unit configured to inspect an alignment state of the first unit electrode and the second unit electrode of the unit battery cells. 10 . The electrode assembly manufacturing apparatus according to claim 9 , wherein a control variable of the second alignment unit is adjusted based on an inspection result of the visual inspection unit.

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